docs: def ami_lookup(region='us-east-1', name='tomcat8'):
      """Look up AMI ID.
  
      Use _name_ to find AMI ID. If no ami_base_url or gitlab_token is provided,
      _name_ is returned as the ami id.
  
      Args:
          region (str): AWS Region to find AMI ID.
          name (str): Simple AMI base name to lookup.
  
      Returns:
          str: AMI ID for _name_ in _region_.
  
      """
      if AMI_JSON_URL:
          ami_dict = _get_ami_dict(AMI_JSON_URL)
          ami_id = ami_dict[region][name]
      elif GITLAB_TOKEN:
          warn_user('Use AMI_JSON_URL feature instead.')
          ami_contents = _get_ami_file(region=region)
          ami_dict = json.loads(ami_contents)
          ami_id = ami_dict[name]
      else:
          ami_id = name
  
      LOG.info('Using AMI: %s', ami_id)
  
      return ami_id